Grinding machine



w. 5. ROGERS GRINDING MACHINE Filed Oct. 15, 1924 Jan. 5 1926.

Patented Jan. 5, 1926.

, UNITED STATES PATENT OFFICE.

WINFIELD S. ROGERS, OF BANTAM. CONNECTICUT. ASSIGNOR TO NELLIE SCOTT ROGERS, OF BAN'IAM. CONNECTICUT.

GRINDINGMACHINE.

Application filed October 15, 1924. Serial No. 743,667.

To all whom it may concern:

Be it known that I, WrNrmLn S. Romans, a citizen of the United States, residing at Bantam, in the county of Litchfield and State of Connecticut, have invented certain new and useful Improvements in Grinding Machines, of which the following is a specification.

This invention -relates to grinding machines, and more esplecially to that type which is operated wit out putting on centers the objects to be ground.

The principal object of said invention is to provide a grinding machine from which the cuttings and grit may be conveniently and completely washed away, ahead of the work. A second object is to provide a grinding machine to which objects may be con tinuously fed and their progress therethrough be assisted by the action of gravity upon said objects.

To these ends, I have provided a machine comprising two horizontal grinding wheels, motive power therefor, means for adjusting the distance between said grinding wheels, a conductor for supplying water or other cooling medium to the grinding surfaces of the wheels and to the objects being ground, and a suitable support for said machine.

In the drawings, Figure 1 is a central vertical sectional view of the machine herein described, and Figure 2 is a top lan View of the same, cooling-medium con uctor removed.

The numeral 1 represents a horizontal grinding wheel, 2 a horizontal feed wheel, 1 and 2 shafts, 3 a motor, 4 a frame, 6 a pipe for cooling-medium, 7 an adjusting-screw, 8 a hand-wheel for 7, 9 adjusting slide, 10 driving gear, 11 driven gear, 12 work guides, 13 clamping-screws for 12, 14 objects to be ground, 15 bearings, 16 gibs, 17 screws, 18 flanges, 19 a sprocket chain, and 20 an opening in the inclosed base.

In a grinding machine of the ordinary sort, the abrasive wheels are vertically arranged, on edge, tandem, and the -cuttin faces thereof are necessarily horizontal, the work of grinding being done between them, upon objects also horizontal. of trouble is often experienced with such machines, from the fact that the cuttingsfrom the work and the grit from the wheels adhere to said wheels, causing them to wear unequally, to glaze, and to become inopera- A great deal tive. The cuttings also get intothe surface of the object being ground, injuring the same. especially if said object is of soft material. To partially oifset these disadvantages. it is customary to flood the said Wheels and the said work with water; and, it is so difiicult to confine said water within proper bounds, that a grinding-room is usually unsanitary and disagreeable in which to work. and the moisture is more or less destructive to the machinery employed and to the material machined therein.

All such defects and objections are obviated by the use of the grinding machine herein described. In my machine, the abrasive wheels 1 and 2 are horizontally disposed'on vertical arbors, so as to present vertical cutting faces, between which the object to be ground 14 is kept perpendicular. A stream of cooling medium is supplied in such man nor as to constantly play upon the cutting edges of both abrasive wheels and also on the object 14.

In my device, the grinding wheel 2 is adjusted by means of the hand-wheel 8, the adjusting-screw 7 and the adjusting-slide 9, to the desired position; the object to be ground (usually a small cylinder, as 14) is fed into the space between the grinding-Wheels and between the work-guides 12, 12. The motive-power may be applied to one grindingwheel and transmitted to the other by means of a belt, chain 10, by gears or by an other means, or it may be motivated by in ependent means. One of said wheels is provided with a fine surface and the other with a coarse cutting surface.

In operation, one wheel is made to rotate at a comparatively low speed, while the other is rapidly revolved, the latter of which cuts the object 14 to the desired size; it being well understood that, in the operation of such machinery, the slowly revolving wheel will rotate the object being ground, while the cutting is done b the rapid wheel, whichever it may be. he object 14 is'carried through the machine by its own gravity, and falls below when it has been given the desired diameter. It is also possible to feed the object 14 automatically, through a chute, from a magazine, but this method is notshown herein.

No especial claim is made for the gearing or other application of power, nor for the means of sliding the grinding-wheels into adjustment with each other; but what I claim is:

A grinding machine comprising horizontal abrasive wheels revolving upon vertical axes and capable of grinding the surfaces of cylindr'ical objects fed perpendicularly therebetween, which objects automatically gravitate therethrough by their own weight; and a conduit capable of discharging by grayit 10 a cooling medium upon the vertical grin grit from said grinding and to maintain free from such cuttings and grit the said OlJJQC-t and the said grinding surfaces.

In testimony whereof I have hereunto affixed my signature.

WINFIELD s. ROGERS. 

